netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack_checksum sysctl

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>

10 files changed, 11 insertions, 12 deletions

diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
index c95561050f78..b76a8685b5b5 100644
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -287,7 +287,6 @@ static inline int nf_ct_is_untracked(const struct sk_buff *skb)
 
 extern int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp);
 extern unsigned int nf_conntrack_htable_size;
-extern int nf_conntrack_checksum;
 extern int nf_conntrack_max;
 
 #define NF_CT_STAT_INC(net, count)      \
diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h
index 2b50758df6a1..38b6dae4d3de 100644
--- a/include/net/netns/conntrack.h
+++ b/include/net/netns/conntrack.h
@@ -17,6 +17,7 @@ struct netns_ct {
 #ifdef CONFIG_NF_CONNTRACK_EVENTS
         struct nf_conntrack_ecache *ecache;
 #endif
+        int                     sysctl_checksum;
 #ifdef CONFIG_SYSCTL
         struct ctl_table_header *sysctl_header;
 #endif
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
index 2e4dd3fb0022..75871b1dd8a8 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -270,7 +270,7 @@ static ctl_table ip_ct_sysctl_table[] = {
         {
                 .ctl_name       = NET_IPV4_NF_CONNTRACK_CHECKSUM,
                 .procname       = "ip_conntrack_checksum",
-                .data           = &nf_conntrack_checksum,
+                .data           = &init_net.ct.sysctl_checksum,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
                 .proc_handler   = &proc_dointvec,
diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
index 205ba399d4a3..ace66cbf9215 100644
--- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
+++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
@@ -188,7 +188,7 @@ icmp_error(struct net *net, struct sk_buff *skb, unsigned int dataoff,
         }
 
         /* See ip_conntrack_proto_tcp.c */
-        if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+        if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
             nf_ip_checksum(skb, hooknum, dataoff, 0)) {
                 if (LOG_INVALID(IPPROTO_ICMP))
                         nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
index df04de91e6ef..fa12e57749ab 100644
--- a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
@@ -187,7 +187,7 @@ icmpv6_error(struct net *net, struct sk_buff *skb, unsigned int dataoff,
                 return -NF_ACCEPT;
         }
 
-        if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+        if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
             nf_ip6_checksum(skb, hooknum, dataoff, IPPROTO_ICMPV6)) {
                 nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL,
                               "nf_ct_icmpv6: ICMPv6 checksum failed\n");
diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c
index 6ead8da3e9e6..769680e68b5e 100644
--- a/net/netfilter/nf_conntrack_proto_dccp.c
+++ b/net/netfilter/nf_conntrack_proto_dccp.c
@@ -575,7 +575,7 @@ static int dccp_error(struct net *net, struct sk_buff *skb,
                 }
         }
 
-        if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+        if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
             nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_DCCP,
                                 pf)) {
                 msg = "nf_ct_dccp: bad checksum ";
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index b5d62d66e02c..131c9be4470a 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -780,7 +780,7 @@ static int tcp_error(struct net *net,
          * because the checksum is assumed to be correct.
          */
         /* FIXME: Source route IP option packets --RR */
-        if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+        if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
             nf_checksum(skb, hooknum, dataoff, IPPROTO_TCP, pf)) {
                 if (LOG_INVALID(IPPROTO_TCP))
                         nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c
index e0ee89e179c1..3d3fffe3f8b9 100644
--- a/net/netfilter/nf_conntrack_proto_udp.c
+++ b/net/netfilter/nf_conntrack_proto_udp.c
@@ -123,7 +123,7 @@ static int udp_error(struct net *net, struct sk_buff *skb, unsigned int dataoff,
          * We skip checking packets on the outgoing path
          * because the checksum is assumed to be correct.
          * FIXME: Source route IP option packets --RR */
-        if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+        if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
             nf_checksum(skb, hooknum, dataoff, IPPROTO_UDP, pf)) {
                 if (LOG_INVALID(IPPROTO_UDP))
                         nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
diff --git a/net/netfilter/nf_conntrack_proto_udplite.c b/net/netfilter/nf_conntrack_proto_udplite.c
index c5b77c8f86c2..3d1697c4f916 100644
--- a/net/netfilter/nf_conntrack_proto_udplite.c
+++ b/net/netfilter/nf_conntrack_proto_udplite.c
@@ -129,7 +129,7 @@ static int udplite_error(struct net *net,
         }
 
         /* Checksum invalid? Ignore. */
-        if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+        if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
             nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_UDP,
                                 pf)) {
                 if (LOG_INVALID(IPPROTO_UDPLITE))
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 64b4f95b367e..5cd066379779 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -322,9 +322,6 @@ static void nf_conntrack_standalone_fini_proc(struct net *net)
 
 /* Sysctl support */
 
-int nf_conntrack_checksum __read_mostly = 1;
-EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
-
 #ifdef CONFIG_SYSCTL
 /* Log invalid packets of a given protocol */
 static int log_invalid_proto_min = 0;
@@ -360,7 +357,7 @@ static ctl_table nf_ct_sysctl_table[] = {
         {
                 .ctl_name       = NET_NF_CONNTRACK_CHECKSUM,
                 .procname       = "nf_conntrack_checksum",
-                .data           = &nf_conntrack_checksum,
+                .data           = &init_net.ct.sysctl_checksum,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
                 .proc_handler   = &proc_dointvec,
@@ -425,6 +422,7 @@ static int nf_conntrack_standalone_init_sysctl(struct net *net)
                 goto out_kmemdup;
 
         table[1].data = &net->ct.count;
+        table[3].data = &net->ct.sysctl_checksum;
 
         net->ct.sysctl_header = register_net_sysctl_table(net,
                                         nf_net_netfilter_sysctl_path, table);
@@ -474,6 +472,7 @@ static int nf_conntrack_net_init(struct net *net)
         ret = nf_conntrack_standalone_init_proc(net);
         if (ret < 0)
                 goto out_proc;
+        net->ct.sysctl_checksum = 1;
         ret = nf_conntrack_standalone_init_sysctl(net);
         if (ret < 0)
                 goto out_sysctl;